I think the NFT market are not seperated from the major crypto markets where NFT are being sold. There are very markets/exchange platforms where NFT are traded as Auctions, I think that not many platform deal only on NFT collections. A combination of NFT collections and sales of tokens is much more common especially on both Cex/Dex exchanges world wide.
Exchanges like Binance, Kucoin, Houbi, display NFT auctions at different times.